rspec users - Jun 2010 - RSpec book errata #57 - undefined method `include' : what to do?

http://pragprog.com/titles/achbd/errata

nr 57:
Ruby 1.8.7
expected [] to include "Welcome to Codebreaker!"

Ruby 1.9.1
undefined method `include'' for #<Object:0x80b32c90>
(NoMethodError)
---

class Output
  def messages
    @messages ||= []
  end

  def puts(message)
    messages << message
  end
end

Then /^I should see "([^\"]*)"$/ do |message|
  output.messages.should include(message)
end
---

I am using Ruby 1.9.2 with cucumber 0.7.3 and Rspec 2.0.0.beta.9.
Is there a fix for this somewhere for this stack of gems and ruby
version?

One hack "solution" looks like this :P

  output.messages.include?(mark).should